* [PATCH] watchdog: sbc60xxwdt: Mark expected switch fall-through
@ 2019-02-26 17:58 Gustavo A. R. Silva
2019-02-26 20:59 ` Guenter Roeck
0 siblings, 1 reply; 2+ messages in thread
From: Gustavo A. R. Silva @ 2019-02-26 17:58 UTC (permalink / raw)
To: Wim Van Sebroeck, Guenter Roeck
Cc: linux-watchdog, linux-kernel, Gustavo A. R. Silva, Kees Cook
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
This patch fixes the following warning:
drivers/watchdog/sbc60xxwdt.c: In function ‘fop_ioctl’:
drivers/watchdog/sbc60xxwdt.c:272:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
wdt_keepalive();
^~~~~~~~~~~~~~~
drivers/watchdog/sbc60xxwdt.c:275:2: note: here
case WDIOC_GETTIMEOUT:
^~~~
Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.
This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
drivers/watchdog/sbc60xxwdt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/watchdog/sbc60xxwdt.c b/drivers/watchdog/sbc60xxwdt.c
index 87333a41f753..72d15fd1f183 100644
--- a/drivers/watchdog/sbc60xxwdt.c
+++ b/drivers/watchdog/sbc60xxwdt.c
@@ -270,8 +270,8 @@ static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
timeout = new_timeout;
wdt_keepalive();
- /* Fall through */
}
+ /* Fall through */
case WDIOC_GETTIMEOUT:
return put_user(timeout, p);
default:
--
2.20.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] watchdog: sbc60xxwdt: Mark expected switch fall-through
2019-02-26 17:58 [PATCH] watchdog: sbc60xxwdt: Mark expected switch fall-through Gustavo A. R. Silva
@ 2019-02-26 20:59 ` Guenter Roeck
0 siblings, 0 replies; 2+ messages in thread
From: Guenter Roeck @ 2019-02-26 20:59 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Wim Van Sebroeck, linux-watchdog, linux-kernel, Kees Cook
On Tue, Feb 26, 2019 at 11:58:35AM -0600, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
>
> This patch fixes the following warning:
>
> drivers/watchdog/sbc60xxwdt.c: In function ‘fop_ioctl’:
> drivers/watchdog/sbc60xxwdt.c:272:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
> wdt_keepalive();
> ^~~~~~~~~~~~~~~
> drivers/watchdog/sbc60xxwdt.c:275:2: note: here
> case WDIOC_GETTIMEOUT:
> ^~~~
>
> Notice that, in this particular case, the code comment is modified
> in accordance with what GCC is expecting to find.
>
> This patch is part of the ongoing efforts to enable
> -Wimplicit-fallthrough.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
> ---
> drivers/watchdog/sbc60xxwdt.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/watchdog/sbc60xxwdt.c b/drivers/watchdog/sbc60xxwdt.c
> index 87333a41f753..72d15fd1f183 100644
> --- a/drivers/watchdog/sbc60xxwdt.c
> +++ b/drivers/watchdog/sbc60xxwdt.c
> @@ -270,8 +270,8 @@ static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
>
> timeout = new_timeout;
> wdt_keepalive();
> - /* Fall through */
> }
> + /* Fall through */
> case WDIOC_GETTIMEOUT:
> return put_user(timeout, p);
> default:
> --
> 2.20.1
>
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